A 100 kg football linebacker moving at 2 m/s tackles head-on an 80 kg halfback running 3 m/s. Neglecting the effects due to digging in of cleats
A) this is a simple example of an elastic collision.
B) the linebacker will drive the halfback backward.
C) neither player will drive the other backward.
D) the halfback will drive the linebacker backward.
D
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A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon
a. 2 m b. 2 cm c. 2 km d. 2 inches e. 2 ft
Describe several features on the Earth's crust explained by plate tectonics
What will be an ideal response?
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in
A) a curved path. B) an outward spiral path. C) an inward spiral path. D) a straight-line path.
Explain why, in space, "no one can hear you scream."
What will be an ideal response?